Dallas-Fort Worth is near the top among markets with the most new "mega warehouses," according to a report by commercial real estate firm CBRE.

Since 2010, area developers have built 13 industrial projects of over 1 million square feet each. That's about the same size as a downtown skyscraper.

D-FW was tied with Southern California's Inland Empire for second place with the most new mega warehouses. Only Philadelphia — with 16 of the huge buildings — had more.

CBRE said 117 of the huge distribution buildings were built around the country since 2010. Almost 30 more buildings of 1 million square feet or more are under construction.

"The spread of these big-box facilities tells us several things," said CBRE researcher David Egan. "Primarily, it underscores the rapid growth of e-commerce, since these megafacilities serve as the backbone of retailers' fulfillment networks, distributing goods across multistate regions."

In North Texas, the huge warehouses have been rented by e-commerce companies — including Amazon — and consumer products firms.

D-FW is one of the busiest warehouse building markets in the country, with more than 20 million square feet of projects under construction at the end of 2016.